import type { PathBinding as ContractPathBinding, PathBindingCreate } from "@umt/contracts";
import type { PathBinding as DomainPathBinding, NewBinding } from "@umt/domain";

// 路径绑定:domain {entityId, scope, season, templateVersion:number, active}
//        ↔ contracts / path_binding {mediaEntityId, bindingKind, seasonNumber, templateVersion:string|null, status}

export type { DomainPathBinding };

/** 模板版本:库里是文本(可能是 "3" 或历史导入的任意串),domain 用整数;无法解析按 0(未知)处理 */
export function parseTemplateVersion(v: string | null): number {
  return v !== null && /^\d+$/.test(v) ? Number(v) : 0;
}

/** path_binding 行 → domain;只有 status=active 的绑定参与目标目录决策 */
export function toDomainPathBinding(b: ContractPathBinding): DomainPathBinding {
  return {
    id: b.id,
    entityId: b.mediaEntityId,
    scope: b.bindingKind,
    ...(b.seasonNumber !== null ? { season: b.seasonNumber } : {}),
    libraryRootId: b.libraryRootId,
    relativePath: b.relativePath,
    templateVersion: parseTemplateVersion(b.templateVersion),
    active: b.status === "active",
  };
}

/** domain 决策里的新绑定 → path_binding 新建输入(status=active) */
export function toPathBindingCreate(
  nb: NewBinding,
  target: { mediaEntityId: string; contentUnitId?: string | null; note?: string | null },
): PathBindingCreate {
  return {
    mediaEntityId: target.mediaEntityId,
    ...(target.contentUnitId !== undefined ? { contentUnitId: target.contentUnitId } : {}),
    bindingKind: nb.scope,
    ...(nb.scope === "season" ? { seasonNumber: nb.season ?? null } : {}),
    libraryRootId: nb.libraryRootId,
    relativePath: nb.relativePath,
    templateVersion: String(nb.templateVersion),
    status: "active",
    ...(target.note !== undefined ? { note: target.note } : {}),
  };
}